"Make sure you try to increase your fluid intake the night before and the morning of to help prepare you and get your fluid stores all up for the race," said Dr. Matthew Daggy, the assistant medical director of the Flying Pig.

Daggy said the best way to hydrate is with a mix of water and sports drinks that have electrolytes. Drinking too much water alone can create other health dangers.

He said beware of warning signs that you're too hot, including chills, nausea, cramping and losing focus.

Again, liquids are key, but there are some exceptions, namely anything containing alcohol and caffeine, including energy drinks.